Expansible reamer.



w. L. SANTMYERS & R. LfHEPNER.

EXPANSIBLE RE MER; APPLICATION FILED FEB. 25. I916.

1,217,833. Patented Feb.- 2 7, 1917.

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rr sans WASHINGTON L. SANTMYEBS, 0F STRASBURG, Ann ROY L. HEPNER,OETOMSBRQOK,

' VIRGINIA.

EXPANSIBLE REAMER.

Specification of Letters Patent.

Patented Feb. 2'7, 1917.

To all whom it may concern:

Be it known that we, WASI IINGTQNHLf SANTMYERS and ROY L. I-InPNnR,citizens of the United States, residing at Strasburg, in the county ofShenandoah and .State of Virginia, and Tomsbrook, in the county ofShenandoah and State of Virginia, respectively, have invented certainnew and useful Improvements in Expansible Reamers, of which thefollowing is a specification.

This invention relates to reamers and more particularly to a combinationexpansible reamer, counter-sink, and tap, and has for its object theprovision of a deviceof this character that will have removable andadjustable cutting blades. a v

Another object is to provide an expansible reamer that has noveladjusting and clamp-, ing means for the cutting blades.

A further object is to provide means for taking care of the cuttings andpreventing the reamer sticking or clogging.

These and other objects such as simplicity, durability, cheapness inmanufacture and the general improvement of the art appear in thefollowing specification and are illustrated in the accompanyingdrawings, in which:

Figure 1 is a side View of our improved expansible reamer,

Fig. 2 is a sectional view of our expansible reamer having one bladeremoved to show the longitudinal groove,

Fig. 3 is a front end view of same, and

Fig. 4 is a view of a blade having tap teeth out therein.

Referring more particularly to the drawings, the numeral 1 designatesthe spindle of the device having tapering grooves 2 cut therein for thereception of blades 3, and a spiral groove 4 out therein for a purposehereinafter described. An enlarged ring 5 is formed adjacent the top ofthe spindle and has slots 6 formed therein in alinement with the grooves2. A threaded extension 7 is formed above the ring 5 and a furtherextension 8 is formed as a chuck engaging member.

The cutting blades 3 have their inner edges 9 formed straight and havebeveled points 10. The cutting edges of said blades taper inwardly fromthe points 10 and terminate adjacent their top in an outwardly extendingbevel A head portion 12 extends upwardly from the bevel 11 and has anotch 13 formed therein for the. reception of adjusti-ngmeans. The topof the head porextension 7 andoperating within the notches 13 intheblades 8.

The clamping means comprises a second disk 16 threaded on the extension7 and having a beveled edge 17 which contacts with the beveled portion14 ofthe blades.

In Fig. 4,1 have shown a blade having serrations on its cutting edge forcutting threads. .A set of these blades may be used in my reamer whichwould readily convert it into an expansible tap.

The operation of the device is as follows: Assuming that the severalparts of the reamer are unassembled, the blades 3 are inserted in thegrooves 2 and the disk 15 is inserted in the notches 13 in the bladesand then screwed down. The clamping disk 16 is" then screwed down inengagement with the beveled portions 14: of the blades clamping them inposition.

The taper of the grooves 2 and the outside or cutting edges of theblades being of the same pitch the circumference of the reamer will bethe same throughout its length.

In use the beveled points 10 of the blades form a counter-sink as doesalso'the beveled portionll of the blades. The spiral groove 4 receivesthe cuttings and prevents clogging and sticking of the reamer.

To change our device to a tap it is only necessary to remove the reamerblades and insert the tap blades shown in Fig. 4 and clamp them inposition.

It will be understood that we may change minor details of constructionand use any number of blades in this device without departing from thespirit of the appended claims.

Having thus described our invention what we claim is:

1. A device of the character described comprising a spindle having aplurality of grooves therein, blades disposed in said grooves, meansoperatable on said spindle for adjusting said blades, and meansoperatable longitudinally on said spindle and engaglng the rear end ofsald blades for toreing the forward ends into position.

2. A reamer comprising a spindle having longitudinal grooves therein, aring formed on said spindle and having slots therein in alinement withsaid grooves, cutting blades disposed in said grooves and said slots,means for adjusting said blades, and means for clamping said blades.

3. A reamer comprising a spindle having longitudinal grooves therein, aring formed on said spindle and having slots therein in alinement withsaid grooves, cutting blades having notches adjacent their upper enddisposed in said grooves and said slots, a disk threaded on the upperend of said spindle and disposed within the notches formed in saidblades, and a second disk threaded on said spindle above said firstnamed disk for clamping said blades in position.

4. An eXpansible reamer comprising a spindle, longitudinal taperinggrooves formed in said spindle, blades having their outer edges taperedon an angle equal to the tapered angle of said grooves, said bladesbeing'disposed in said grooves, and means on the rear end of saidspindle for adjust ing and clamping said blades in position.

5. An expansible reainer comprising a spindle, longitudinal groovesformed in said spindle, blades disposed in said grooves, said bladeshaving their lower ends cut away on an angle to form a counter-sink andadapted to extend below said spindle, means mountedon the rear of saidspindle for adjusting said blades and means mounted 011 the rear end ofsaid spindle and engaging the rear ends of said blades for clamping themin position. 7

' 6. in expansible reamer comprising a spindle, longitudinal groovesformed in said spindle, blades disposed in said grooves, said bladeshaving a counter-sink formed at the rear oi their cutting edge and attheir forward end, and means on the rear end of said spindle foradjusting and clamping said blades in position.

In testimony vwhereof we'hereto aflix our signatures. a

WASHINGTON L. SANTMYERS. ROY L. H PNER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. 0.

